Plan a Meeting (Outlook 2003)

I want to plan a meeting with my boss. Today is May 12th. I want to plan the meeting for Dec 12th. When I select Plan a Meeting and enter my bosses name, I can also see two months into the future. Any date pass that has the No Information symbol showing (slahes). Is there a way I can see more that 2 months of my bosses schedule to see if the time is "Free" to setup a meeting???